Pump.



No. 874,377. PATEBITED 132072 1, 1907.

/ N. W. AKIMOPP.

PUMP.

APPLICATION FILED JULY 18, 1907.

4, SEEETS-SEEBT l.

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PATENTED DEC. 24, 1907.

.N. W, AKIMOPP,

PUMP. APPLICATION FILED JULY 18.1907.

4 SHEETS-SHEET 3.

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WI TNESSES PATENTED DEC 24, 1907.

N; W. AKIMOPE.

PUMP. APPLICATION FILED JULY 18. 1907.

4 flET-ETS-SHBET 4.

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fireman ed withoutshoch to, deliver vent-ion will be more but now residing at NIoiiorAs WLAninin AKIMOFF,

or PHILADELPHIA, rsnnsrtvinm.

' runs.

Specification of Letters Patent.-

. v Patented. Dec. 1907.

Application filed July 18,1907- Serial No. 384.343.

To all whom it may concern:

Be it known that I, NICHOLAS WLADIMIR AEIMOFF, subject the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, haveinvented certain new and useful Improvements in Pumps, of which the following is a specification.

' My invention has relation more particularly to a pump of the turbine type; and in such connection it relates 'to the provision of means to permit without shock of the entrance of i cud into the impeller and to pre vent of a vortex actionof the entering fluid.

' The principal objects of my invention are,

first, to provide a pump of the turbine type with removable suction guide sleeves adaptfiuid to the imeller by changing'the course of the flow of the Fluid before reaching the impeller, thereby preventing any side thrust thereof, inthe delivery of the fluid to the impeller; second to provide each oi the suction guide sleeves with a tubular portion surrounding the shaft of the pump and prevent movement tering fluid by the shaft as well as by the innor tips of the impeller blades; third to provide the suction sleeves with an extension having laterally projecting blades to positively guide the lluid to the impeller and with an annular portion adapted to connect the sleeves with the housinglof, the pump;

fourth to provide the pump within the volute discharge casing thereof with a difiuser to permit of the strengtheningof thecasing I by 'olts and at the same time the-connection of the difiuser by these bolts withthecasing without obstructing the assagef of fiuid through channels of the d' LHQBY; and fifth to provide the pump with a housing formed of sections similar in outline to each other and each having a leg supporting a section and an inlet opening for-fluid.

The nature and scope of my present in fully understood from the tollowingdescription taken in connection with the second anying drawings form ing part hereof, in ich .ii'gures 1 and 2 areviews, illustrating res ectively, in side elevation and in top or p an,a pump of theturbine type embodying main features of my saidinvention. Fig.

is a view,- illustrating partly, in central secof the Czar of Russia, 5

cold stationary therein to being mparted to the en- 5 1 tion and partly in side elevation, the volute casing of the pump, the shaft, the suction guide sleeve surrounding the same with blades extending therefrom, and supporting a ring, the impeller surrounding one portion of the suction guide sleeve and having curved i blades of varying lengths, a difi user formed of sections, and bolts connecting each of the sections with the volute casing and theends s the casing with each other. Fig. 4 is a l longitudinal central sectional view of the 3 pump. Fig. 5 is a detail view, illustrating the connection of the diffuser sections with I i the volute casing by bolts, and a similar con.- 1 nection of the impeller with side plates by 1 bolts passing through the impeller, the blades r and side plates thereof. Fig. 6 is a view illustrating partly in sections and partly in l elevation, a modified form of pump designated as a multistage turbo-pump, provided with suction guide sleeves. Fig. 7 is a similar view, illustratin ahorizontally arranged turbine pump; an Figs. 8 and 9, are views, illustrating partly in, section and partly in elevation, pump with modified forms of volute discharge casings.

Referring to'the drawings 8, represents a' sectional housing, eachsection, consisting of a bearing portion 9, from which extends a cup-shaped portion 10, terminating in an outwardly flaring and inclined dislnshaped portion 11, which is provided with a step- 'ke flange portion 12, and a leg 14, preferably extending iromthe bearing-portion 9, and cup-shaped portion 10, as shown in Figs. 1 and l','inclu'sive. The leg 14-, serves to sup port thesection8,upon a base 15, to which the leg 14, is removably connected by preferably bolts 16. The different portions of each section being thus formed. integral with each other-and of the same outline will require for their casting one pattern only, which pattern, however, must been arranged as to permit of the casting of an annular boss 19, and an inlet opening 18, alternately in opposite sides of the cup-shaped portion 10, so that each section 8, is adapte to serve either as l for the reception of flanges 21, of thecasing.

The latter by means of bolts 22, passing 1 in which an impeller 35, is rotated by a shaft through the flanges 12, of the sections and engaging the flanges 21, are removably see cured to the sections 8.- In this instance the housing of the pump is formed of three parts only, the two sections 8, and volute casing 20, wlnch latter serves in the usual manner for an outlet for fluid from the pump,

whilefluidbty means of pipes 23, engaging the bosses 19, o the sections 8, and branches 25, of a pipe 24, 1s conducted-into the same through the openings 18. To permit of the} connection of the flanges 21, oft-he volute casing 20, by rivets-or bolts to strengthen the same and to render the casing secure with a diffuser having inclined sides 29, arranged parallel to each other, and sections'28, having in clined sides 30, arranged at an angle to the sides 29, thereof.

The sections 27 and 28', of the diifuserl 26, are formed by first casting a solid diffuser;

ring, which is then cut to form the sections 27 and 28. The sections 27 and 28, are so shaped as to permit of the assembling of the difluser 26, from the inside of the volute. cas- Ing 20, by first introducing; the sections 27,

and then introducing between the same, thesections 28. The space formed between the sections 27 and 28, due to the cutting are closed preferably, by distance pieces 31, as

.shown in Fig. 3. Each of the diffuser 'sections 27 and 28, is provided with a substantially wedge-shaped solid portion 32, ar-

ranged tangentially to an impellerto be hereinafter more fully described and with depressions at each side of the solid portion 32, forming in conjunction with a depression of the adjacent portion channels, 33, to permit of the passage of fluid into the volute or Bolts or rivets 34, connect e. flanges. 21, of the casing 20, with each other, by passing through the 'solid portion or blades 32, of the sections 27 and 28, of the diffuser 26," so that in no way obstruct the passage of fluid through the channels 33, as,

will be readily understood from Figs. 3 and 5.

Instead of'forming the volute casing20, of a single casting the samemay be divided into sections and 51, each havinga flange 52, and bolts 53, connecting the sections with each other, by .passingthrough the flanges 52 thereof,'as shown in Fig. 9'; or the sections 50' and 51, of the volute casing20, may be formed integral with the sections 8,

. of the housing, as shown in Fig. 8. In this instance, the difluser 26, consists of a solid or uncut'ring, which is secured to the sections 8, by bolts 54, passing through the portions 12, of the sections 8, and through the blades 32, of'the ring.

. The. sections 8, form' a structure or housing,

provided 38, supported by the bearings 9, of the sections 8, and driven by ainotor or by a pulley 39, as shown in Figs. 2, 4, 8 and 9. .In order to permit substantially without shock of the entrance of fluid tothe impeller 35, and also to prevent vortex-movement of the fluid entering the pu'inp through the inlets 18, at each side of the impeller 35, and surrounding the' shaft-38, is removably arranged a suction guide sleeve 40. Each of the suction guide sleeves 40, consists of a tubular portion 41, loosely surrounding the shaft 38, and terminating in an outwardly flaring extension 42, which-is provided with laterally extending blades or vanes 43, connected with each other at their outer free ends by a ring-shaped or annular portion 44, which not only strengthens the blades 43, but by engaging a recess 45, arranged in the section 8, serves to hold the suction guide sleeve 40, so formed, stationary in each section 8.

The impeller 35, rotating between the ex tensions 42, of the guide sleeves 40, is provided with two sets of long and short blades 36 and 37, of which the longer blades 36, at their inner ends terminate at the outwardly flaring portion 42, of the suction sleeve .40, and the blades '45 thereof. Both sets of blades 36 and 37, serve to support side plates 46, which are secured thereto by rivets or bolts 47, passing through the plates '46, blades 36 and 37, and the impeller 35, as shown in Fig. 5. The impeller 35, when roin Fig. 3, by meansof the blades 36 and 37,

and forces the same through the channels 33, of the diffuser 26, into the volute casing 20, which conducts the same from thepunip. The impact of the fluid entering the sections 8, is first taken up by the tubular portion 41, of the suction sleeve 40, which conducts the after which the fluid is deflected in a direction'substantially atright angles to the shaft 38, by the outwardly flaring portion 42,'of the sleeve 40, through the channels 48, formed by the blades 43, thereof. The force of impactand the deflection of fluid in its flow to the impeller 35, is thus completely taken up, by the'suction guide sleeves 40, so that the fluid positively guided by the blades 43, to the impeller when entering the chanlivercd substantially without shock to the impeller, and without side thrust exerted 1n such delivery to the impeller. Moreover. l by covering the shaft 33, by the stationary suction sleeves 40, no rotary or vortex-11love- .mentis 1111 art-ed by the shafll andrtlie inner 7 tips of the impeller blades 36, to the fluid, so 1 that the same en ers the channels 49, of the tated in the direction indicated by the arrow sucks fluid through. the in et openings 18,-

same in a direction parallel to the shaft 38, I

nels 49, formed by the blades 36, will be deis driven by an electric motor iUI: other i housing,

.said shaft within said housing,

housing, consisting of sections of uniform A outline, each or said sections having a dparpassing, through the solid portions of said impeller, without oii'ering resistance to the shaped portion, a diiiuservsupported by said blades 36. The same results will be obsections, a shaft centrally arranged in said tained by the stationary suction sleeve 40, sections, a suction-sleeve arranged at each when applied to a horizontally arranged side of said impeller andremovably supportpump, such as is shown in Fig. 7. In this type of pump the fluid to-be raised enters the l 7 pump by openings is, likewise arranged in I; said housing so as to prevent by the same the cup-shaped extension 10, of one-of the transmission of movement from said impeller sections 8, thereof. T he shaft- 38, terminates to said sleeves. r at a point more or' less remote fromthe level 5. In a pump of th character described, a of the fluid in which the p n'np'rs placed, and 1 housing, a volute casingsupported by said a diffuser, consisting of sections rein'eans, not shown. With qually good re- 1 movably secured to said casing, each of the sults and for the purpose specified the stasections of said diffuser having ends inclined tionar v suction sleeves 40, may also be ap with respect to the outer and inner faces plied to multi-stagc turbo pumps. as shown I thereof, to permit of the assembling of the in Fig 6. In this instance, th tubular porl sections from the interior of said casing, a tioii 41, of the second sleeve 40*, is shorti'shaft carried by said housing, and an im- I l ing means engaging the respective section of ened in length. to adapt .the same to such peller carried by said shaft.

type of pump. I 6. In a pump of the character described, a Having thus described the/nature and obhousing, consisting of sections, each section jccts of my invention, what I claim as new having a bearing portion extending into parand desire to secure by Letters Patent is g tially cup-shaped and rnitvwar'clly flaring dish- 1. In a pump of the character described, a shaped portions surrounded by step-like housing, a shaft arranged in said housing, an flanged ortions, and a leg projecting from impeller carried by said shaft within said housing, asuct1onsleeve removably supporta volute casing havlng ends engaging the ed by said shaft and interposed between said flanges of each section, and means for removimpellcr and said housing, said suction-sleeve l ably connecting the casing with said sections having means engaging said housing so as to byengaging the ends of the casing and flanges prevent transmission of movement from said o the sections. impeller-to said sleeve. l 7. In a pump of the character described, a

2. In a pump of the character described, a 1 housing, consisting of sections, each section housing having a cup-shaped and outwardly having a bearing portion extending into a flaring dish-shaped section and an inlet for E partially cup-shaped and outwardly flaring fluid arranged in the cup-shaped )OIillOIl of the section, a shaft arranged in saiil housing, an impeller carried by said shaft within said housing, a suction-sleeve remov'ably supported by said shaftand interposed between said impeller and housing, said suction-sleeve having laterally projecting blades connected at their free ends by a ring-shaped portion and -said ring-shapedportion arran'gedto frictioually engage said housing so as to prevent transmission of movement from said impeller to said sleeve.

3. In a pump of the character described, a housing consisting of sections, each section having a pari ially cup-shaped and outwardly llaringdish-shaped portion, a shaft support- 5. ed by said section, an impeller carried by 1 suctionsleeves removably suppcrtei'l' by said shaft 5 and respectively arranged between said im i peller and said housing, each said sleeves having means engaging said housing so as to preyent by the same trai'ismission of move- 1 housing, a diliuser arrange 1n said casing, mentfroin said impeller to said. sleeve. consisting of sections, each having, a solid 4.. Ina pump of the character described, a ortion forming a biade and a depression librming a passageway for fluid. and bolts the bearing and cup-shaped portion thereof,

5 portions, ternunating in substantially sem1 circular portions having flanges,'a boss projecting from the cup-shaped portion and communicating with an opening arranged therein and a leg projecting from the bearing and cup-shaped portion thereof and S11 porting the scctio'nso formed and means to removably connecting said sections by engaging the flanges thereof. i

8. In a pump of the character described, a housing, a volute casing supported. by said housing, a diffuser arranger.

in said casing, consisting of sections, each having a solid irming a passageway for fluid and bolts passing through the solid portions of said sections so asto rigidly connect thesame with said casing, a shaft carried by saidhousv ing, and an impeller carried by said. shaft.,.,

9. In a pump of the character desc'ribed,'a housing, a volute casing su orted-by said tially cup-shaped and outwardly flaring sh sections so as ed by said shaft and each of said sleeves havv dish-shaped portion surrounded by straight portion forming a blade and a depression to; rigidly connectthe same with saigtcasing, a' shaft carriegl by said h0usf In testimonywhereof, I have hereunto set gng, an lmpeller carried by sald shaft, and a iply slgnature in the presence of two subscribsuctwn-sleeve removably supported by said mg wltnssses.

shaftand interposed between said im eller xmuoms wmnnlm AKHIOFF. and houslng, said suction-sleeve havmg v \vltnesses: v means engagingsaid housing so as to hold Q J. WALTER DoUGLAss,

the same stationary therein. 1 THOMAS NILSMITII. 

